sysinfo.php

<?php

/**
 * Useful system information about your WordPress install.
 *
 * @package   Sysinfor
 * @author    Leo Gopal
 * @copyright 2020 Leo Gopal
 * @license   GPL-2.0-or-later
 *
 * @wordpress-plugin
 * Plugin Name: SysInfo
 * Plugin URI: http://wordpress.org/extend/plugins/sysinfo/
 * Description: Useful system information about your WordPress install.
 * Version: 1.2.0
 * Requires at least: 4.2
 * Requires PHP: 5.6
 * Author: Leo Gopal
 * Author URI: https://leogopal.com
 * License: GPL2
 * Text Domain: sysinfo
 *
 * Copyright 2020 Leo Gopal, Seramade
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

class SysInfo {
	function __construct() {
		// Global constants first
		define( 'SYSINFO_VERSION_KEY', 'sysinfo_version' );
		define( 'SYSINFO_VERSION_NUM', '1.1.0' );
		define( 'SYSINFO_PLUGIN_NAME', trim( dirname( plugin_basename( __FILE__ ) ), '/' ) );
		define( 'SYSINFO_PLUGIN_DIR', WP_PLUGIN_DIR . '/' . SYSINFO_PLUGIN_NAME );
		define( 'SYSINFO_PLUGIN_URL', WP_PLUGIN_URL . '/' . SYSINFO_PLUGIN_NAME );

		// Activation/deactivation hooks
		register_activation_hook( __FILE__, array( $this, 'do_activation' ) );
		register_deactivation_hook( __FILE__, array( $this, 'do_deactivation' ) );

		// Any other hooks we need
		add_action( 'init', array( $this, 'load_textdomain' ) );
		add_action( 'admin_menu', array( $this, 'add_tools_page' ) );
		add_filter( 'plugin_action_links', array( $this, 'add_action_links' ), 10, 2 );
	}

	function activate() {
		update_option( SYSINFO_VERSION_KEY, SYSINFO_VERSION_NUM );
	}

	function deactivate() {
		delete_option( SYSINFO_VERSION_KEY );
	}

	function do_activation( $network_wide ) {
		if ( $network_wide ) {
			$this->call_function_for_each_site( array( $this, 'activate' ) );
		} else {
			$this->activate();
		}
	}

	function do_deactivation( $network_wide ) {
		if ( $network_wide ) {
			$this->call_function_for_each_site( array( $this, 'deactivate' ) );
		} else {
			$this->deactivate();
		}
	}

	function call_function_for_each_site( $function ) {
		global $wpdb;

		// Hold this so we can switch back to it
		$current_blog = $wpdb->blogid;

		// Get all the blogs/sites in the network and invoke the function for each one
		$blog_ids = $wpdb->get_col( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs" ) );
		foreach ( $blog_ids as $blog_id ) {
			switch_to_blog( $blog_id );
			call_user_func( $function );
		}

		// Now switch back to the root blog
		switch_to_blog( $current_blog );
	}

	function load_textdomain() {
		load_plugin_textdomain( 'sysinfo', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
	}

	function add_tools_page() {
		$admin_pages = array();

		$parent_slug    = 'tools.php';
		$page_title     = __( 'SysInfo', 'sysinfo' );
		$sub_menu_title = __( 'SysInfo', 'sysinfo' );
		$capability     = 'manage_options';
		$menu_slug      = 'sysinfo';
		$function       = array( $this, 'add_sysinfo_page' );
		$admin_pages[]  = add_submenu_page( $parent_slug, $page_title, $sub_menu_title, $capability, $menu_slug, $function );

		foreach ( $admin_pages as $admin_page ) {
			add_action( "admin_print_styles-{$admin_page}", array( $this, 'add_admin_styles' ) );
		}
	}

	function add_sysinfo_page() {
		require_once 'views/admin.php';
	}

	function add_admin_styles() {
		wp_enqueue_style( 'sysinfo-css', SYSINFO_PLUGIN_URL . '/css/sysinfo.css' );
	}

	function add_action_links( $links, $file ) {
		static $this_plugin;

		if ( ! $this_plugin ) {
			$this_plugin = plugin_basename( __FILE__ );
		}

		if ( $file == $this_plugin ) {
			$packs_link = '<a href="' . admin_url( 'tools.php?page=sysinfo' ) . '">' . __( 'View', 'sysinfo' ) . '</a>';
			array_unshift( $links, $packs_link );
		}

		return $links;
	}

	function get_browser() {
		// http://www.php.net/manual/en/function.get-browser.php#101125.
		// Cleaned up a bit, but overall it's the same.

		$user_agent   = $_SERVER['HTTP_USER_AGENT'];
		$browser_name = 'Unknown';
		$platform     = 'Unknown';
		$version      = "";

		// First get the platform
		if ( preg_match( '/linux/i', $user_agent ) ) {
			$platform = 'Linux';
		} elseif ( preg_match( '/macintosh|mac os x/i', $user_agent ) ) {
			$platform = 'Mac';
		} elseif ( preg_match( '/windows|win32/i', $user_agent ) ) {
			$platform = 'Windows';
		}

		// Next get the name of the user agent yes seperately and for good reason
		if ( preg_match( '/MSIE/i', $user_agent ) && ! preg_match( '/Opera/i', $user_agent ) ) {
			$browser_name       = 'Internet Explorer';
			$browser_name_short = "MSIE";
		} elseif ( preg_match( '/Firefox/i', $user_agent ) ) {
			$browser_name       = 'Mozilla Firefox';
			$browser_name_short = "Firefox";
		} elseif ( preg_match( '/Chrome/i', $user_agent ) ) {
			$browser_name       = 'Google Chrome';
			$browser_name_short = "Chrome";
		} elseif ( preg_match( '/Safari/i', $user_agent ) ) {
			$browser_name       = 'Apple Safari';
			$browser_name_short = "Safari";
		} elseif ( preg_match( '/Opera/i', $user_agent ) ) {
			$browser_name       = 'Opera';
			$browser_name_short = "Opera";
		} elseif ( preg_match( '/Netscape/i', $user_agent ) ) {
			$browser_name       = 'Netscape';
			$browser_name_short = "Netscape";
		}

		// Finally get the correct version number
		$known   = array( 'Version', $browser_name_short, 'other' );
		$pattern = '#(?<browser>' . join( '|', $known ) . ')[/ ]+(?<version>[0-9.|a-zA-Z.]*)#';
		if ( ! preg_match_all( $pattern, $user_agent, $matches ) ) {
			// We have no matching number just continue
		}

		// See how many we have
		$i = count( $matches['browser'] );
		if ( $i != 1 ) {
			// We will have two since we are not using 'other' argument yet
			// See if version is before or after the name
			if ( strripos( $user_agent, "Version" ) < strripos( $user_agent, $browser_name_short ) ) {
				$version = $matches['version'][0];
			} else {
				$version = $matches['version'][1];
			}
		} else {
			$version = $matches['version'][0];
		}

		// Check if we have a number
		if ( $version == null || $version == "" ) {
			$version = "?";
		}

		return array(
			'user_agent' => $user_agent,
			'name'       => $browser_name,
			'version'    => $version,
			'platform'   => $platform,
			'pattern'    => $pattern
		);
	}

	function get_all_plugins() {
		return get_plugins();
	}

	function get_active_plugins() {
		return get_option( 'active_plugins', array() );
	}

	function get_memory_usage() {
		return round( memory_get_usage() / 1024 / 1024, 2 );
	}

	function get_all_options() {
		// Not to be confused with the core deprecated get_alloptions

		return wp_load_alloptions();
	}

	function get_transients_in_options( $options ) {
		$transients = array();

		foreach ( $options as $name => $value ) {
			if ( stristr( $name, 'transient' ) ) {
				$transients[ $name ] = $value;
			}
		}

		return $transients;
	}
}

// Let's get this party started
$sysinfo = new SysInfo();